Almanac Gardener (from UNC-TV)

http://video.unctv.org/program/almanac-gardener/

Dendrology at Virginia Tech (fact sheets on 900 tree species)

http://dendro.cnre.vt.edu/dendrology/main.htm

Native Plants

http://www.ncsu.edu/goingnative

Native Plants for Wildlife Habitat and Conservation Landscaping – Chesapeake Bay Watershed

http://www.nps.gov/plants/pubs/chesapeake/

Plant Disease and Insect Clinic (from North Carolina Extension)

http://www.cals.ncsu.edu/plantpath/extension/clinic/

TrufFiles (from North  Carolina Extension)

http://www.turffiles.ncsu.edu/

US Department of Agriculture

http://www.usda.gov

USDA Plant Hardiness Zone Map

http://planthardiness.ars.usda.gov/PHZMWeb/#